AD 2014-23-11
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Boeing | Company | Airworthiness Directives; The Boeing Company Airplanes |
Unsafe Condition
Fatigue cracking in certain upper chords of the upper deck floor beams, which could result in reduced structural integrity of the airplane and rapid decompression or reduced controllability of the airplane.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect for cracking of the web, upper chord, and upper chord strap of the upper deck floor beams, and repair any cracking. Perform a preventive modification of the upper deck floor beams. Conduct repetitive inspections for cracking after accomplishing the modification. Perform a second modification and conduct repetitive inspections for cracking, with repair if necessary.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within 50 flight hours after the effective date of this AD.
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Affected Aircraft
Boeing Model 747-400F series airplanes with certain configurations as specified in the AD.
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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